WO2000018537A1 - Alliage de metaux d'apport de brasage pour structure brasee en acier inoxydable, et metal d'apport de brasage pour acier inoxydable - Google Patents

Alliage de metaux d'apport de brasage pour structure brasee en acier inoxydable, et metal d'apport de brasage pour acier inoxydable Download PDF

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Publication number
WO2000018537A1
WO2000018537A1 PCT/JP1999/005155 JP9905155W WO0018537A1 WO 2000018537 A1 WO2000018537 A1 WO 2000018537A1 JP 9905155 W JP9905155 W JP 9905155W WO 0018537 A1 WO0018537 A1 WO 0018537A1
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WO
WIPO (PCT)
Prior art keywords
stainless steel
brazing
alloy
based metal
metal layer
Prior art date
Application number
PCT/JP1999/005155
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English (en)
Japanese (ja)
Inventor
Masami Ueda
Masaaki Ishio
Hidetoshi Noda
Tsuyoshi Hasegawa
Original Assignee
Sumitomo Special Metals Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Special Metals Co., Ltd. filed Critical Sumitomo Special Metals Co., Ltd.
Priority to EP99943452A priority Critical patent/EP1036628A4/fr
Priority to US09/554,947 priority patent/US6605371B1/en
Priority to JP2000572047A priority patent/JP3383288B2/ja
Publication of WO2000018537A1 publication Critical patent/WO2000018537A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3026—Mn as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/302—Cu as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3033—Ni as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0233—Sheets, foils
    • B23K35/0238—Sheets, foils layered
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/94—Pressure bonding, e.g. explosive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12778—Alternative base metals from diverse categories
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12882—Cu-base component alternative to Ag-, Au-, or Ni-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component
    • Y10T428/12917—Next to Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component
    • Y10T428/12917—Next to Fe-base component
    • Y10T428/12924—Fe-base has 0.01-1.7% carbon [i.e., steel]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12937—Co- or Ni-base component next to Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12944—Ni-base component

Definitions

  • brazing alloy for stainless steel brazing structure brazed by the brazing alloy, and brazing material for stainless steel
  • the present invention relates to a brazing alloy for stainless steel and a filter material for brazing stainless steel members to each other, or a member formed of stainless steel and a member formed of a steel material, and a brazing alloy made of the above brazing alloy. It relates to the brazed structure in contact.
  • the brazing structure include a heat exchanger such as a radiator and a gas cooler, a chemical device, and a composite pipe having a stainless steel sleeve.
  • heat exchangers used in exhaust gas purifiers are made of stainless steel with excellent corrosion resistance, such as SUS304 and SUS430 specified in JIS (Japanese Industrial Standard). Copper brazing, Mn: 5 to 20%, or Ni: 1 to 5% described in Japanese Patent Application Laid-Open No. Sho 60-72695, and Ni: 1 to 5%, with the balance substantially Cu
  • a brazing alloy comprising Cu as a main component has been used.
  • the present invention provides a brazing alloy for stainless steel, which has excellent corrosion resistance and oxidation resistance at the brazing portion, a brazing structure brazed by the brazing alloy, and a filter material for stainless steel excellent in productivity.
  • the purpose is to provide. Disclosure of the invention
  • the brazing alloy for stainless steel of the present invention is a brazing alloy for stainless steel that brazes a member formed of stainless steel and a member formed of a steel material including stainless steel. Its components are, as shown in Figure 1, in weight percent:
  • Mn, Ni, and Cu within the range enclosed by (excluding Mn50%) are essential components. Below, for convenience, simply wt%. /. May be described.
  • the melting point of the brazing alloy can be reduced by diffusion of Fe from stainless steel into the brazing alloy during brazing, and the stainless steel member constituting the brazing structure can be used for annealing steel members.
  • the melting point is 1100 ° C on the high concentration side of Ni from the line A-B in Fig. 1. Since it exceeds C, it is necessary to be on the low concentration side of Ni from the line A-B.
  • the corrosion resistance, oxidation resistance and lowering of the melting point of the alloy in the above content range are not impaired, but rather these properties are improved.
  • Elements can be added.
  • Si: 2.0% or less can be contained in the brazing alloy together with the Cr or the like or alone.
  • a member formed of stainless steel and a member formed of a steel material including stainless steel are brazed by the brazing metal for stainless steel.
  • Such a welded structure is made of the above-mentioned brazing alloy and has excellent corrosion resistance and oxidation resistance. Therefore, the structure as a whole has excellent corrosion resistance and oxidation resistance.
  • the stainless steel brazing material of the present invention is a stainless steel filter material for brazing a member formed of stainless steel and a member formed of a steel material including stainless steel.
  • This brazing material was formed from an Mn-Ni alloy containing Mn and Ni as main components or an Mn-Ni-Cu alloy containing Mn, Ni and Cu as main components.
  • the Mn-based metal layer and the Ni-based metal layer are laminated and joined to each other, and the average content of each component in each cross section perpendicular to the length direction of the filter medium is defined as the composition range of the brazing alloy. It is a thing.
  • the brazing alloy of the present invention is generally inferior in workability.
  • points A and F Mn 23%, Ni 37 ⁇ 1 ⁇ 2, Cu 40%
  • G point Mn 35%, Ni 25%, Cu 40%
  • H point Mn 50%, Ni 45%, Cu 5 %)
  • a region surrounded by point E According to braze the c the present invention are difficult to process composition range, the M n based metal layer and n i based metal layer, on the market as a general-purpose metal It can be formed of the above-mentioned Mn—Ni alloy, Mn_Ni—Cu alloy, Ni, Ni alloy, and Ni—Cu alloy having good workability.
  • the brazing material is melted during brazing.
  • the Mn-based metal layer and the Ni-based metal layer are mutually dissolved, and the brazing alloy composition is obtained. Since this brazing material is not in the form of powder or foil, but has a certain shape, it has good brazing workability. Further, it is not necessary to melt and form the brazing alloy of the present invention, which is inferior in workability, and to form the formed piece into an appropriate shape such as a strip material, so that the productivity is excellent.
  • the brazing material of the present invention is a filter material for stainless steel that brazes a member formed of stainless steel and a member formed of a steel material including stainless steel.
  • This brazing material is formed of an Mn-Ni alloy containing Mn, Ni as a main component or an Mn-Ni-Cu alloy containing Mn, Ni, Cu as a main component.
  • the Ni-based metal layers are laminated and pressed together, and the average content of each component in each cross section perpendicular to the longitudinal direction of the filter medium is the composition of the brazing alloy. It is a range. Since the Ni-based metal layer is more excellent in corrosion resistance than the Mn-based metal layer, according to the brazing material of the present invention, the Ni-based metal layer and the Ni-based metal layer having the minimum number of layers are used. A brazing material whose surface is hardly corroded can be obtained, and the quality of the brazing material is prevented from deteriorating.
  • a brazing material having a laminated structure can be easily and easily manufactured, which is excellent in industrial productivity and reduces manufacturing costs. Can be planned.
  • the pressure welding can be easily performed by superposing the respective materials of the Mn-based metal layer and the Ni-based metal layer and passing them through a pair of reduction rolls.
  • FIG. 1 shows the essential components of the brazing alloy of the present invention, Mn,?
  • FIG. 3 is a composition diagram showing a composition range of ⁇ ⁇ ⁇
  • FIG. 2 is a cross-sectional view showing the structure of the brazing material according to the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view showing a structure of a brazing material according to a second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing the structure of the third embodiment of the brazing material of the present invention.
  • Figure 5 shows an end longitudinal section of a composite pipe with a stainless steel sleeve brazed into an iron pipe.
  • FIG. 6 is a longitudinal sectional view of the brazing structure used in the oxidation resistance test. BEST MODE FOR CARRYING OUT THE INVENTION
  • brazing alloy for stainless steel of the present invention As shown in Figure 1, weight. /. so,
  • Point B (Mn 18%, Ni 27%, Cu 55%),-Point C (Mn 42%, Ni 3%, Cu 55%), Point D (Mn 50%, Ni 3%, Cu 47%),
  • Mn, Ni, and Cu within the range enclosed by (excluding Mn 50%) are essential components.
  • Mn was selected as one of the essential components of the brazing alloy of the present invention.
  • Ag, Sn, Zn, Cd, P, Si, and Mn can be considered as elements that lower the melting point of the Cu—Ni alloy.
  • Ag deteriorates the wettability to stainless steel.
  • Sn, Zn, and P significantly deteriorate the workability of the Cu—Ni alloy.
  • Zn and Cd are unsuitable for brazing in a vacuum because of their high vapor pressure, and these metal vapors promote oxidation of the stainless steel surface.
  • Si is added in excess of 2.0%, the additivity deteriorates rapidly, and a sufficient decrease in melting point cannot be expected. Since Mn does not have the above-mentioned disadvantages, in the present invention, Mn is used as the third component responsible for lowering the melting point, in addition to Cu and Ni.
  • the melting point of the brazing alloy can be reduced by suppressing the diffusion of Fe from the stainless steel to the brazing material during brazing, and the stainless steel members constituting the brazing structure ⁇ In order to reach 110 to 900 ° C, which can perform contact at the same time, the concentration of Ni is higher than that of line A—B in Fig. 1. On the other hand, the melting point is higher than 110 ° C, so it is necessary to set the concentration to the low concentration side of Ni from the AB line.
  • the content range of Mn, Ni, and Cu is, as described above, the shaded range in FIG. 1 (however, excluding Mn 50%), but the three components are essentially Component.
  • the essential components are unavoidable impurities and the content of a component which does not impair the properties of the brazing alloy composed of the above three components, that is, corrosion resistance, oxidation resistance and low melting point, and do not prevent the content of elements which improve these characteristics.
  • the additive amount of the element or characteristic improving elements that do not impair the properties of the braze alloy is a low concentration of less than about 1 0%, -Mn, other than three components N i and C u
  • the apparent content represented by the product of the actual content and 100 Z (100-A) is obtained for each of the three components.
  • the properties of the brazing alloy of the present invention are not impaired as long as it is within the shaded range of FIG. 1 (however, Mn ⁇ 50%).
  • the property improving element for example, one or more of the following C r, C o, M o, A 1 and T i, or further S S can be added, and the following (1), ( 2).
  • Si 2.0% or less
  • reasons for limiting the characteristic improving element are described below.
  • Cr has the effect of improving corrosion resistance. Since such an effect is slight when the amount of addition is too small, it is preferable to add 1% or more. On the other hand, if it is added excessively, the workability deteriorates, so the upper limit is set to 500%. Preferably, Ru 0.3 to 2.0% der.
  • Co has an effect of improving corrosion resistance. It also has the effect of improving cold and hot plastic workability. Since such an effect is slight when the addition amount is too small, the addition of 1.0% or more is preferable. On the other hand, even if it is added excessively, the effect is saturated and the cost is increased. Therefore, the upper limit is set to 5.0%. Preferably it is 1.0 to 3.0%. -
  • a 1 has the effect of improving corrosion resistance. Since such an effect is slight when the amount of addition is too small, it is preferable to add 0.1% or more. On the other hand, if it is added excessively, the workability deteriorates. Therefore, the upper limit is set to 5.0%. It is preferably from 0.3 to 2.0%.
  • Ti has the effect of improving corrosion resistance. Since such an effect is slight when the amount of addition is too small, it is preferable to add 0.1% or more. On the other hand, even if it is added excessively, the effect is saturated and the cost increases, so the upper limit is set to 3.0%. Preferably it is 0.3 to 2.0%.
  • Total amount of at least one of Cr, Co, Mo, Al, Ti 5.0% or less
  • the content is set to 5.0% or less, preferably 3.0% or less.
  • S i has the effect of lowering the melting point. Since such an effect is slight when the amount of addition is too small, it is preferable to add 0.1% or more. On the other hand, if it is added excessively, the workability deteriorates, so the upper limit is set to 2.0%. Preferably it is 0.33 to 1.0%.
  • the total amount of these elements is preferably 5.0% or less, more preferably 3.0% or less. It is better to put it below.
  • the composition of the brazing alloy of the present invention is as described above, the points A and F in FIG. 1 (Mn 23%, Ni 37%, Cu 40 %), G_ point (Mn 35%, Ni 25%, Cu 40%), H point (Mn 50%, Ni 45%, Cu 5%), E point
  • G_ point Mn 35%, Ni 25%, Cu 40%
  • H point Mn 50%, Ni 45%, Cu 5%
  • E point The enclosed area is particularly difficult to plastically process. Alloys in this difficult-to-work range can be processed into strips by sintering the powder or extruding the sintered body under high temperature and high pressure.
  • alloys in the range excluding the difficult-to-work area surrounded by AF GHEA from the area surrounded by ABCDEA are not as difficult to work as the alloys in the hard-work area, but have low elongation and low thermal conductivity. Therefore, it is not possible to say that the workability is good.- For this reason, the alloy in this low workability range is not more than 10 o / o after soaking the ingot melted and formed for a sufficient time. It is necessary to repeat the forging and heating at a relatively small rolling reduction rate to reduce the surface area.
  • the forged piece, which has been reduced in surface area to an appropriate size is formed into a strip, rod, wire, or other strip material by rolling, extruding, drawing, or the like.
  • FIG. 2 shows a first embodiment of the brazing material of the present invention.
  • the brazing material 1 is a strip-shaped composite material in which one Mn-based metal layer 2 and one Ni-based metal layer 3 are joined together: It is formed of a Mn-Ni alloy whose main component is Mn, Ni or a ⁇ -Ni-Cu alloy whose main component is Mn, Ni, Cu.
  • Mn-Ni-Cu alloys include, for example, high-Mn-containing general-purpose alloys such as 70-73% Mn, 8-10% Ni, and high thermal expansion alloys for bimetals consisting essentially of Cu. Can be used.
  • the Ni-based metal layer 3 has a good workability, and is composed of pure Ni and Ni mainly composed of Ni.
  • the Ni—Cu alloy is formed of an i-alloy or a Ni—Cu alloy having Ni and Cu as main components.
  • As the Ni—Cu alloy 2.530% Ni, the balance being substantially C
  • General-purpose alloys such as cupronickel composed of u, 670% Ni, and a monument metal substantially composed of Cu can be used.
  • the characteristics included in the brazing alloy of the present invention can be improved.
  • the Mn-based metal layer 2 Ni-based metal layer 3 is such that the average content of each component forming each cross section in the length direction of the brazing material 1 is within the composition range of the brazing alloy of the present invention.
  • the composition and layer thickness of each layer are set.
  • the Mn-based metal layer 2 and the Ni-based metal layer 3 have good workability, they can be easily joined by pressure welding (cold pressure welding) at room temperature.
  • pressure welding cold pressure welding
  • the Ni-based metal sheet, which is the material of the Ni-based metal layer 3 are overlapped and passed through a pair of reduction rolls. It can be easily implemented by rolling down at a rolling reduction of about%.
  • the composite material in which the Mn-based metal layer and the Ni-based metal layer are pressed together is then rolled once or multiple times at an appropriate reduction ratio as needed, so that a filter material having a predetermined thickness is obtained.
  • the total thickness of the brazing material 1 is preferably about 0.022 mm. It is technically difficult to reduce the pressure to less than 0.02 mm, and handling of the filter medium becomes difficult. On the other hand, if it exceeds 2, each layer becomes difficult to melt quickly during brazing, and it becomes difficult to obtain a uniform brazing alloy.
  • the width of the brazing material can be set to an appropriate width depending on the purpose of use, but is usually about 140. By slitting the strip-shaped filter medium with an appropriate width in the length direction, a narrow filter medium can be obtained.
  • FIG. 3 shows a second embodiment of the filler material according to the present invention.
  • the filler material 1A includes one Mn-based metal layer 2 and two Ni This is a strip-shaped composite material to which the base metal layer 33 is pressed.
  • the Mn-based metal layer 2 and the Ni-based metal layer 33 are formed of each component forming each cross-section in the length direction of the brazing material 1A.
  • the composition and thickness of each layer are determined so that the average content is within the composition range of the brazing alloy.
  • the Mn-based metal layer 2 and the Ni-based metal layer 3, 3 have the same composition range as the same layer of the filter medium 1 in the first embodiment. Omitted.
  • both surfaces of the Mn-based metal layer 2 are covered with Ni-based metal layers 3 and 3 having better corrosion resistance than the Mn-based metal layer 2, so that the brazing material 1 A
  • the outer surface is hardly corroded, quality is prevented from deteriorating, and handling is excellent.
  • the Mn-based metal layer 2 and the Ni-based metal layers 3, 3 are pressed against each other by a pressing down hole.
  • the Ni-based metal thin plates which are the materials of the Ni-based metal layers 3 and 3
  • the Mn-based metal thin plates which are the material of the Mn-based metal layer 2
  • these are pressed simultaneously. May be.
  • the Ni-based metal sheet was superimposed on one surface of the Mn-based metal sheet, passed through a reduction roll and pressed, and the Ni-based metal layer was pressed against one surface of the Mn-based metal layer.
  • another Ni-based metal thin plate may be superimposed on the other surface of the Mn-based metal layer, and may be further pressed through the reduction hole-the total thickness of the brazing material 1A May be set to about 0.02 to 2 mm as in the first embodiment.
  • the brazing material 1A has extremely excellent dimensional stability in the length direction with respect to a temperature change. Quality and handleability are further improved.
  • a strip-shaped filter medium 1 in which a planar Mn-based metal layer 2 and a planar Ni-based metal layer 3 are stacked and pressed together is shown in FIG.
  • a linear brazing material 1B in which a cylindrical Ni-based metal layer 3 is joined to an outer peripheral surface of a shaft-shaped Mn-based metal layer 2 constituting a central portion may be used! 4
  • the Mn-based metal layer 2 and the Ni-based metal layer 3 have the same components as those of the same layer of the brazing material 1 in the first embodiment. Is omitted.
  • the brazing material 1B is manufactured by fitting a sleeve, which is a material of the Ni-based metal layer 3, to a shaft material, which is a material of the Mn-based metal layer 2, and performing a drawing process. During this processing, the Mn-based metal layer 2 and the Ni-based metal layer 3 are pressed together. This brazing material
  • the outer diameter of 1B is usually about l to 3 mm.
  • the brazing material 1A is composed of one Mn-based metal layer 2 and two Ni-based metal layers 3, 3, but the Mn-based metal layer and the Ni-based metal
  • the number of layers can be set freely.
  • two Mn-based metal layers and three Ni-based metal layers may be used, and the Ni-based metal layers may be disposed on the outermost layer, and the layers may be alternately stacked. .
  • a heat exchanger or a chemical exchanger is manufactured by using a filter material that is formed into a strip shape or a wire shape from a brazing alloy piece of the present invention into a strip shape or a linear shape, or the brazing materials 1, 1A, and 1B according to the embodiment.
  • a brazed portion of the brazing alloy composition having excellent corrosion resistance and oxidation resistance is formed.
  • Brazing is performed by placing a brazing material between the members, pressing the members together to bring the brazing material into close contact with the joint, heating and melting the brazing material, and cooling and solidifying the brazing material.
  • the brazing material may be disposed between the members to assemble the members, and the filter material may be heated in an annealing furnace so as to be in close contact with the joining portion by its own weight or weight, and then cooled. According to this method, annealing and brazing of the member can be performed simultaneously.
  • FIG. 5 shows a composite pipe in which a stainless steel sleeve 12 is brazed to the inner surface of the end of the iron pipe 11.
  • the iron tube 11 is formed of an iron material which is difficult to weld, such as austenitic iron or ductile iron, which has been improved in corrosion resistance and heat resistance by adding Ni and Cu.
  • the sleeve 12 is for connecting a stainless steel pump, is fitted to the end of the iron pipe 11, and the inner end 13 is soldered to the inner surface of the iron pipe 11. .
  • This brazing can be performed by TIG wire welding using a linear brazing filler metal as a filler wire.
  • Filter media for stainless steel having various compositions shown in Table 1 below were produced.
  • Sample Nos. 1 to 10 in Table 1 are difficult-to-process compositions, so the composition and thickness ratio shown in Table 2 (Equivalent to the area ratio.)
  • the laminate is passed through a pair of reduction rolls at room temperature and reduced at a reduction rate of 60% to form a three-layer composite in which an Ni-based metal layer is pressed against both sides of the M ⁇ -based metal layer.
  • the composition of the brazing alloy in Table 1 indicates the average composition at each cross section in the longitudinal direction of the filter medium.
  • the other samples were prepared by melting and brazing a brazing alloy, holding at 800 ° C for 6 hours, soaking it sufficiently, and performing hot forging with a draft of 10% about 6 times. After performing, the obtained forged piece was rolled to produce a strip-shaped filter medium having a thickness of 0.05 mm. Corrosion tests and oxidation tests were performed using these samples. The corrosion test was performed as follows.
  • the oxidation test was performed as follows. SUS304 stainless steel substrate (thickness l mm, vertical 5 OX width 50 mm) and tiled iron substrate (thickness 5 ⁇ , width 50 mm, length 50 mm) A square brazing material (thickness: 0.05 mm, length: 40 x width: 40 mm) is concentrically placed on top of it, and a SUS304 pipe (inner diameter: 30 mm, pipe thickness) (0.5 mm) vertically, and heated in a heating furnace at the melting point of the sample brazing alloy + 20 ° C. As shown in Fig. 6, the lower end of the pipe 22 is placed on the substrate 21. A test structure was prepared that was in contact with the metal.
  • the melting points of the brazing alloys of Sample Nos. 1 to 10 according to the examples of the present invention are 900 to 110. It is in the range of C, and the corrosion test result is only 0.5% at the maximum. Also, the oxidation test result is less than 80 ⁇ .
  • the melting points of sample Nos. 21 and 26 of the comparative examples are higher than 110 ° C., the heating temperature during brazing becomes high, and Fe diffusion from stainless steel occurs. However, the corrosion resistance and oxidation resistance are both deteriorated. Further, although the melting points of the sample Nos. 22 to 25 of the comparative examples are appropriate, the corrosion resistance and the oxidation resistance are deteriorated because the components are out of the range of the present invention. Industrial applicability
  • the brazing alloy and filter material of the present invention are suitable for brazing stainless steel members such as exhaust gas heat exchangers and the like, which are required to have corrosion resistance and oxidation resistance, and for brazing stainless steel members and steel members. Can be used for In addition, the brazing structure brazed by the brazing alloy of the present invention has excellent durability since the brazing portion has excellent corrosion resistance and oxidation resistance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fuel Cell (AREA)
  • Arc Welding In General (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un alliage de métaux d'apport de brasage composé essentiellement de Mn, Ni, et Cu dans la zone délimitée par les points A (Mn 37 %, Ni 63 %, Cu 0%), B (Mn 18 %, Ni 27 %, Cu 55%), C (Mn 42 %, Ni 3 %, Cu 55%), D (Mn 50 %, Ni 3 %, Cu 47%) et E (Mn 50 %, Ni 50 %, Cu 0%), tous ces pourcentages étant indiqués en poids, comme l'illustre la Figure, étant entendu que les compositions renfermant 50 % de Mn sont exclues. L'alliage de métaux d'apport de brasage comprend une couche métallique à base de Mn constituée d'un alliage Mn-Ni ou d'un alliage Mn-Ni-Cu, et une couche métallique à base de Ni constituée de Ni, d'un alliage de Ni ou d'un alliage Ni-Cu, lesquelles couches sont stratifiées et liées. Ledit alliage comporte une teneur moyenne en chaque composant, mesurée par rapport à chaque section transversale perpendiculaire au sens longitudinal, qui se trouve dans la plage de l'alliage de métaux d'apport de brasage précité. L'alliage de métaux d'apport de brasage, qui est caractérisé par un point de fusion similaire à celui du cuivre de brasage, présente une résistance à la corrosion et à l'oxydation.
PCT/JP1999/005155 1998-09-28 1999-09-20 Alliage de metaux d'apport de brasage pour structure brasee en acier inoxydable, et metal d'apport de brasage pour acier inoxydable WO2000018537A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99943452A EP1036628A4 (fr) 1998-09-28 1999-09-20 Alliage de metaux d'apport de brasage pour structure brasee en acier inoxydable, et metal d'apport de brasage pour acier inoxydable
US09/554,947 US6605371B1 (en) 1998-09-28 1999-09-20 Brazing alloy for stainless steel, structure braze-assembled with the brazing alloy, and brazing material for stainless steel
JP2000572047A JP3383288B2 (ja) 1998-09-28 1999-09-20 ステンレス鋼用ろう合金、そのろう合金によってろう接されたろう接構造物およびステンレス鋼用ろう材

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/272406 1998-09-28
JP27240698 1998-09-28

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WO2000018537A1 true WO2000018537A1 (fr) 2000-04-06

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US8029916B2 (en) 2005-03-29 2011-10-04 Neomax Materials Co., Ltd. Brazing filler metal, brazing composite material and brazed structure brazed/bonded with the same
US10105795B2 (en) 2012-05-25 2018-10-23 General Electric Company Braze compositions, and related devices
WO2023112788A1 (fr) * 2021-12-15 2023-06-22 株式会社ファインスティールエンジニアリング Pièce coulée en fer, pièce d'assemblage et procédé de fabrication de pièce coulée en fer

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US20070148490A1 (en) * 2003-12-24 2007-06-28 Neomax Materials Co., Ltd. Brazing method and brazed structure
AU2008265507B2 (en) * 2007-06-19 2013-10-31 Tata Steel Limited Lance for injecting solid material into a vessel
CN101185992B (zh) * 2007-12-14 2010-05-19 四川大学 一种含活性元素Ti适合钎焊钼及其合金的锰基钎料
CN104646848B (zh) * 2013-11-25 2017-05-24 上海工程技术大学 一种用于钎焊不锈钢的钎料及其制备方法
DE102016116265A1 (de) 2016-08-31 2018-03-01 Faurecia Emissions Control Technologies, Germany Gmbh Lotwerkstoff auf Kupferbasis und Verwendung des Lotwerkstoffs
US11623306B2 (en) * 2018-10-09 2023-04-11 Resonac Corporation Brazing filler material for bonding iron-based sintered member, and method for producing iron-based sintered part
CN112427833B (zh) * 2020-11-16 2022-02-01 中机智能装备创新研究院(宁波)有限公司 一种锰基药芯钎料及其制备方法和用途

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US8029916B2 (en) 2005-03-29 2011-10-04 Neomax Materials Co., Ltd. Brazing filler metal, brazing composite material and brazed structure brazed/bonded with the same
US10105795B2 (en) 2012-05-25 2018-10-23 General Electric Company Braze compositions, and related devices
WO2023112788A1 (fr) * 2021-12-15 2023-06-22 株式会社ファインスティールエンジニアリング Pièce coulée en fer, pièce d'assemblage et procédé de fabrication de pièce coulée en fer

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EP1036628A1 (fr) 2000-09-20

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